T UMi Keeps Mysterious

Details T UMi Keeps Mysterious T UMi Keeps Mysterious

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006oejv...23....3s&link_type=abstract

Open European Journal on Variable Stars, Vol. 23, Proceedings of the 37th Conference on Variable Stars Research, Edited by L. Br

Physics

Scientific paper

The well known long-period variable T UMi of Mira type has ranked among the most observed stars becouse of its strange behaviour. 25 years ago, the rapid decrease of period started - from original 301d long period to todays 200 - 220 days. Such behaviour can be explained as He-burning in shell surrounding the stelar nucleus. Author presents his CCD multicolor photometry of T UMi as well.

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